JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Assertion and Reason

  • question_answer
    Assertion             :       A beaker is completely filled with water at 4°C. It will overflow, both when heated or cooled. Reason                 :       There is expansion of water below and above 4°C.

    A)             If both assertion and reason are true and the reason is the correct explanation of the assertion.

    B)             If both assertion and reason are true but reason is not the correct explanation of the assertion.

    C)             If assertion is true but reason is false.

    D)             If the assertion and reason both are false.

    E)             If assertion is false but reason is true.

    Correct Answer: A

    Solution :

                Water has maximum density at 4°C. On heating above 4°C or cooling below 4°C, density of water decreases and its volume increases. Therefore, water overflows in both the cases.


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